The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2015
Filed:
Jan. 08, 2010
Paul A. Charpentier, London, CA;
Kevin D. Burgess, Toronto, CA;
Paul A. Charpentier, London, CA;
Kevin D. Burgess, Toronto, CA;
THE UNIVERSITY OF WESTERN ONTARIO, London, ON, CA;
Abstract
The present invention provides two methods for synthesizing novel titania-polyurethane (nTiO-PU) nanocomposites for self-cleaning coatings, one a polymer functionalization method ('grafting to') and the other, a monomer functionalization method ('grafting from'). Here, 2,2 bis(hydroxymethyl) propionic acid (HMPA) was used as the coordination agent, which was reacted with n-TiO(50:50 anatase/rutile) to form nTiO-HMPA, then polymerized in the monomer functionalization method. In the polymer functionalization method, HMPA was reacted with a pre-polymer to form the PU, and then subsequently reacted with n-TiOto form the polymer nanocomposite. The photocatalytic cleanability of the nanocomposites was investigated when exposed to ultraviolet radiation using additional unreacted HMPA or stearic acid as the model “dirt” compounds. Nanocomposites prepared using both strategies showed similar self-cleaning behavior, although the monomer technique gave less substrate degradation.